net/mlx5: Read the TC mapping of all priorities on ETS query

[ Upstream commit 44d553188c38ac74b799dfdcebafef2f7bb70942 ]

When ETS configurations are queried by the user to get the mapping
assignment between packet priority and traffic class, only priorities up
to maximum TCs are queried from QTCT register in FW to retrieve their
assigned TC, leaving the rest of the priorities mapped to the default
TC #0 which might be misleading.

Fix by querying the TC mapping of all priorities on each ETS query,
regardless of the maximum number of TCs configured in FW.

Fixes: 548cd5e38029 ("net/mlx5e: Read ETS settings directly from firmware")
Signed-off-by: Maher Sanalla <msanalla@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
index 01f2918063af043297956ef6afe362b2f22cc0ec..f1952e14c80423b68147a6aa2de715521b087987 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
@@ -109,12 +109,14 @@ static int mlx5e_dcbnl_ieee_getets(struct net_device *netdev,
        if (!MLX5_CAP_GEN(priv->mdev, ets))
                return -EOPNOTSUPP;
 
-       ets->ets_cap = mlx5_max_tc(priv->mdev) + 1;
-       for (i = 0; i < ets->ets_cap; i++) {
+       for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
                err = mlx5_query_port_prio_tc(mdev, i, &ets->prio_tc[i]);
                if (err)
                        return err;
+       }
 
+       ets->ets_cap = mlx5_max_tc(priv->mdev) + 1;
+       for (i = 0; i < ets->ets_cap; i++) {
                err = mlx5_query_port_tc_group(mdev, i, &tc_group[i]);
                if (err)
                        return err;